Archives: Projects

1.2V to 35V Adjustable DC-DC Converter project has been design around TI’s  LM2576-ADJ IC. Inputs supply 40 VDC.  LM2576-ADJ is a monolithic integrated circuit that provides all the active functions for step down switching regulator, capable of driving 3A load with excellent line...

High Current PWM Halogen Dimmer controller project is designed around SG3525 IC and High current MOSFET.  Project can handle lamp up to 5 Amps (10Amps Possible with big heat sink) and supply 12-24V DC .Ideal for Halogen Dichroic Lamp or Halogen Lamp. Specifications Supply input...

Voice Changer project can be used to transpose or distort one's voice by encoding the sound appearing at the Microphone input.  This project  is built around AP8072 IC. Specifications Supply input : 6 VDC @ 200 mA Output : Speaker, 8 Ω / 0.5 W Audio amplifier type...

The Tiny Mic Preamplifier based is based on a single transistor amplifier design.  It amplifies the output of the electret condenser microphone.  Good choice for Karaoke. Specifications Power supply: 5 ~ 9 VDC @ 2 mA Provides standard audio signal PCB dimensions 26 mm x 56...

H-Bridge has been designed around IR2104 IC from International Rectifier. The board has been made mainly for DC-Motor applications. The driver can handle a load up to 8-10Amps. I have tested this board with 36V DC supply . The circuit also uses N Channel IR540 MOSFETS from...

1.6W Mono Audio Amplifier Project is based on TDA7231, which is class AB power amplifier with a wide range of supply. Features Power supply: 5  To 12 VDC Output: 1.6 W, 4 Ω / 1 W, 8 Ω Low crossover distortion, soft clipping PR1 Preset for Volume Adjust Terminal pins...

This project shows how to build a very simple yet very useful tool that every DIY enthusiast should have in his lab: a 100MHz+ frequency counter. The schematic is fairly simple and straightforward and uses a PIC16F628A microcontroller for measuring frequency and a high speed...

This tiny Unipolar stepper motor driver has been designed around SLA7078MPR IC from Sanken. It is a unipolar stepper Motor driver that can handle current up to 3 Amps and has micro-stepping up to 1/16 steps. On-board Jumpers are available to set the Micro-stepping and Preset...